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12.5=d/2.1
We simplify the equation to the form, which is simple to understand
12.5=d/2.1
We move all terms containing d to the left and all other terms to the right.
-0.47619047619048d=-12.5
We simplify left and right side of the equation.
-0.47619047619048d=-12.5
We divide both sides of the equation by -00.47619047619048 to get d.
d=26.25
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